Sad but yes it does. So the only way is to switch the rear shaft completely?

Post 2007 E9x's wavetrac had a kit where you'd send your dif/ring gear assembly to them, and they'd separate the ring gear from the diff with a CNC machine, then they'd drill and thread it to allow bolt mounting to the wavetrac diff - super fun, like an extra $700 fun or something like that

Post 2007 E9x's wavetrac had a kit where you'd send your dif/ring gear assembly to them, and they'd separate the ring gear from the diff with a CNC machine, then they'd drill and thread it to allow bolt mounting to the wavetrac diff - super fun, like an extra $700 fun or something like that

This is quite a money saving approach. Respect to wavetrac if they'll manage to do it the same way for F30
Нere in Moscow the only way available now is to install a complete rear shaft with Quaife diff. The price is 5k$ incl. labor hours.